Update fonts/Hack-ttf to 2.019.

Changes:
# Version 2.019 (release build)

ttf, otf, webfont builds

- removed SVG from webfont releases
- Corrected U+2588 glyph shape in regular set (had inappropriately small
  width and height)
- decreased width U+2580 all sets
- decreased width U+2581 all sets
- decreased width U+2582 all sets
- decreased width U+2583 all sets
- decreased width U+2584 all sets
- decreased width U+2585 all sets
- decreased width U+2586 all sets
- decreased width U+2857 all sets
- adjusted left sidebearing U+2589 all sets
- adjusted left sidebearing U+258A all sets
- adjusted left sidebearing U+258B all sets
- adjusted left sidebearing U+258C all sets
- adjusted left sidebearing U+258D all sets
- adjusted left sidebearing U+258E all sets
- adjusted left sidebearing U+258F all sets
- adjusted right sidebearing U+2590 all sets
- decreased width of U+2594 all sets
- adjusted right sidebearing U+2595 all sets
- adjusted left sidebearing U+2596 all sets
- adjusted right sidebearing U+2597 all sets
- adjusted left sidebearing U+2598 all sets
- decreased width of U+2599 all sets
- decreased width of U+259A all sets
- decreased width of U+259B all sets
- decreased width of U+259C all sets
- adjusted right sidebearing U+259D all sets
- decreased width of U+259E all sets
- decreased width of U+259F all sets
- increased upper terminal position to 1950 units U+2580 all sets
- increased upper terminal position to 1950 units U+2588 all sets
- increased upper terminal position to 1950 units U+2589 all sets
- increased upper terminal position to 1950 units U+258A all sets
- increased upper terminal position to 1950 units U+258B all sets
- increased upper terminal position to 1950 units U+258C all sets
- increased upper terminal position to 1950 units U+258D all sets
- increased upper terminal position to 1950 units U+258E all sets
- increased upper terminal position to 1950 units U+258F all sets
- increased upper terminal position to 1950 units U+2590 all sets
- increased upper terminal position to 1950 units U+2594 all sets
- increased upper terminal position to 1950 units U+2595 all sets
- increased upper terminal position to 1950 units U+2598 all sets
- increased upper terminal position to 1950 units U+2599 all sets
- increased upper terminal position to 1950 units U+259A all sets
- increased upper terminal position to 1950 units U+259B all sets
- increased upper terminal position to 1950 units U+259C all sets
- increased upper terminal position to 1950 units U+259D all sets
- increased upper terminal position to 1950 units U+259E all sets
- increased upper terminal position to 1950 units U+259F all sets
- reverted Cyrillic lower case es glyph (U+0441) to Latin lower case c shape
- reverted Cyrillic upper case es glyph (U+0421) to Latin upper case C shape

(leot)